Seeking new challenges, the most senior female executive at Google is set to preside over a brand new domain -- the company’s multibillion-dollar video sharing property, YouTube.

In a lateral move, Susan Wojcicki -- the 16th employee at Google, which was actually founded out of her Menlo Park garage -- will transition out of her role as senior vice president of advertising and commerce.

In turn, Salar Kamangar, Google’s ninth employee -- who has served as YouTube’s CEO since 2010 -- is rumored to be joining the internet giant’s venture capital arm.

“Like Salar, Susan has a healthy disregard for the impossible and is excited about improving YouTube in ways that people will love," Google CEO Larry Page said in a statement.

Wojcicki has long been a champion of YouTube since its acquisition in 2006 for $1.65 billion, and the management shakeup implies a sharpening focus on the division’s plateauing ad revenues, reports Forbes. While immensely profitable, YouTube is still dwarfed by the $200 billion television advertising industry, meaning a trove of opportunities still linger.

Though YouTube netted $5.6 billion last year and accounts for 21 percent of all video ad revenue in the United States, according to research firm eMarketer, it has recently encountered a few bumps.

In addition to the first-ever YouTube Music Awards, widely considered a flop, many video creators are balking at sinking ad prices in an increasingly congested community, notes The New York Times.

Wojcicki’s appointment represents the latest reshuffling of Google’s uber-exclusive L-Team -- a pool of senior executives that report directly to Page. Wojcicki formerly shared the ads and commerce leadership position with Sridhar Ramaswamy, who will now head the division alone.